PARIS, May 24 (AFP) - American Andre Agassi, as fit and focused as he has been for three years, played some superb tennis to down Argentina's Franco Squillari in four sets on Monday and qualify for the second round of the men's singles at the French Open. Agassi, seeded 13th, downed the 38th-ranked Argentine player 3-6, 7-5, 7-5, 6-3 to earn a rousing ovation from the center court crowd at Roland Garros. He hammered down three aces in the final game to end the spirited challenge of Squillari. "It felt good to close it out in quick fashion like that," he said. "It was getting tough out there towards the end, but today was a great first step against a difficult opponent." Agassi had been troubled by a shoulder injury in the lead-up to the French Open but was clearly in good shape as he outlasted Squillari over 2hr 43min. "I could feel it on some overheads and poor ball tosses, but for the most part the shoulder held up pretty well," he said. Agassi said he had seldom felt so confident going into a Grand Slam. "I feel physically a lot stronger than I have done for a while," he said. "My eagerness is there for the grinding you have to do to win these matches. "I'm focused and I know if I can perform well here, accomplish great things, that will make things a lot better for me for the rest of the year. "I certainly have high expectations of myself here." Agassi, 29, won Wimbledon in 1992, the US Open in 1994 and the Australian Open in 1995 but has had a rollercoaster career over the past three years and has never won a French title. The American next faces Frenchman Arnaud Clement - who rallied from the brink of defeat to beat compatriot Cedric Pioline 3-6, 3-6, 7-6 (10/8), 6-4, 6-3 in a 3hr 33min marathon - and he admits he cannot expect the crowd support he traditionally enjoys at Roland Garros for that contest. "There is a special relationship between myself and Roland Garros," he said. "But I'll forgive the crowd if they don't cheer for me next time."  